From: Jay Pal (jay.b.pal@gmail.com)
Date: Mon Mar 16 2009 - 06:10:11 ART
Hello Everyone,
I am trying to lab up a scenario where I want use explicit path as the first
priority to set up the path and a dynamic if the explicit path fails. I am
using OSPF as the underlying IGP, as a test I am just using 3 routers. R1
and R3 are directly connected and R4 is connected to R1 and R3 (triangle). I
am building tunnel between R1 & R3, but my explicit path is through R4.
I can see the tunnel built through R4 and when I shut down R4, TE tunnel
goes via 'dynamic' path-option directly to R3. However, when I bring up
router R4 the tunnel does not fall back to the explicit path-option which
has a priority of 1 (dynamic is 2).
Below is my configuration for the tunnel. I would imagine that it should go
back to my explicit path, unless there is a rule that otimization happens
after certain time. Think I need to do more reading on TE.
let me know if there are other outputs that I shoudl post.
!
interface Tunnel0
ip unnumbered Loopback0
tunnel destination 3.3.3.3
tunnel mode mpls traffic-eng
tunnel mpls traffic-eng autoroute announce
tunnel mpls traffic-eng path-option 1 explicit name r1-r3
tunnel mpls traffic-eng path-option 2 dynamic
This is what I see even if the explicit path is up and running:
path option 2, type dynamic (Basis for Setup, path weight 2)
path option 1, type explicit r1-r3
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